Concentrating device for mineral ores.



H1325, 19,07. I 986,389, Patented Mar.7,1911. 5 SHEETS -BHEBT 1.

WITNESSES}.

986,389. 1 Patented Mar.7,1911.

5 SHEETSSHEET 2.

.576 nnnnjlnnunn lllllllllllllllHlll IHIIIIIIIIHIIIIIIHIII lllllHllJlllllllHlllllllllIIIIIHI i a 1 T WITNESSES: INVENTOR I ATTORNEY H. T-. HERE.

GONCENTRATING DEVICE FOR MINERAL OEES,

APPLICATION FILED JUNE 25, 1907.

Patented M21117, 1911.

5 SHEETSBHEET 3.

INVENTOR ATTORN EY H. T. HERE.

UONGENTRATING DEVICE FOR MINERAL 0358.

APPLICATION FILED JUNE 25, 1907.

Patented Mar. 7, 1911.

5 BEEETSSEEET- 4.

,. INVENTOR WITNESSES: 6% @144? ATTORN EY H. T. HERB.

GONUENTRATING DEVICE FOR MINERAL-GEES.

APPLICATION FILED JUNE 25, 1907.

986,389, Patented Mar.'?, 1911.

5 sung-$113M 5.

WITNESSES: INVENTORV m I BY I 1 v y ATTORNEY UNITED STATES Pa'rENT OFFICE.-

HERBERT '1. KERR, Q1! DENVER, COLORADO, ASSIGNOR T GEORGE WESTINGHOfi S E,

To all whom it may-concern:

OF PITTSBURG, PENNSYLVANIA. i

Specification of Lettcrs Patent.

Applteattoufllcd June 25. 1907. Serial No. 380,801.

citizen of the United States, and a resident; of Denver, in the city and county of Denver 5 and State of Colorado. have invented a new and useful.Iniprovement in Col'ice'ntratiug Devices for Mineral tires, of which the following is a specification.

My invention relates to' means forseparating minerals from vein rock or ganguc with which it is usually mixed as it comes from the. mine, and it has special reference tosuclh-deviees as are commonly known as concentrating tables.

Thcohject of my invention is to provide a device' of the class above indicated that shall-exceed in eflicieney and reliahility devices heretofore emploved for the sauie purpose and which shall provide tl1c highest possible separation and concentrationwith a relatively small amount of power.

The concentrating tables of the-prior art have often been employed for separating '-valuahle minerals from refuse. material and have generally comprised an inclined table to which an oscillatory motion was imparted, therrushed ore being fed through a hopper onto the table at its highest corner and the ditl'erence in the specific gravity bet ween the articles -of the ore being relied upon to pro uc the. desired separation. In order to facilitate. this separation. the top surfaces of the tables have usually been provided with strips or bars which were disposed in substantially parallel lines and in line with the oscillatory movement, of the table. By making the lateral inclination'of the table "reater'tha-n its longitudinal inclination and y suitably regulatii'ig its longitudinal move- 4 ment, the heavier portions of the on; grad -na-ll v traveled towa'rdthe end of the table along' the lines of the partitions. and the lighter material uinpcd over the barriers and fell '05 the side of the table,

It will be readily understood that unless considerable difierence in the spmificgravities of the useful and gaugue materials existed. the concentration was relatively uncertain. r I According to my present invention, l. provide a concentmting device which is similar in general to the eonmiitrating tables above (lQSClilIlHL hllt its elliciency and reliability are increased materially by a special arfrangcment of el wlromagnets whereby the CONCENTRATING DEVICE FOR MINER/AI! ORES.

Patented Mar. .7, i911.

surface of the table becomes uniformly at-' tractive to such {iart-icles'of the ore as are inagnet izahle. even to the slightest. decree. By this means. a separatiou is obtainec het'wecn particles differing only slight-l) in specific gravity which is COlllllttilllllt" with the separation wh'c'h has ordinarily been obtamed when a nuterial ditfercnce in sp'eeifie gravity existed; in otherwords, the specific gravity of the magnetimhle particles of ore is virtually increased. F'gure 1 of the; aceom ianying, drawings isa perspective view 0 a concentrating table constructed in accordance with my invention. the surface of the'tablc being adapted for a. dry process in which "air is forced through a line screen over which the ore passes. Figs. 9, 3, and 4 are, respectively, aside and an end elevation and a plan view of a concentrating table which is also "15 constructed in accordance with my invcnthat, hot which adapted for practicing a wet process in which the ore is mixed with water hefore it is passed onto thesurface of' the. table. Figs. 5. 6. T, 8, 9, and-10 are 30 detail views of the tahlcs shown in Figs. 1,2, 3. and 4. i Referring to the drawings. in whieh'eorresponding part-s are designated by the same reference. characters. the concentrating de- 5 vice here illustrated comprises a rotatahly adjustable supporting structure 1, areciprocating mechanism 2, a table 3. and a hop pcri.

The supporting structure 1 may he of any suitable design. and, as shown, comprises a pair of channel beams 35 and shaft projee tions (3- which support the beams and are firmly secured to their ends. 'The shaft pr0- jections are rotatably supported in stationary bearings 7 winch-are so arranged as to cla1np.the structure 1 in position afterthe rotatable adjustment of this part. has been effected.

l-l-. The arm 12 is actuated by means of a colon-cling rod 16 which attached to an eccentric projection 15 on the shaft 9. Y

rigid frame or box 17, which forms apart. of the. table 3, is adjustably mounted 11o structure. 1 and the table 3 and are con-,

nccted b' 'y a helical siring 22,' for which any other suitable resi ient connection ma be substituted. In order to confine the a justment of the table relativeto the sup-' portingstructure l to a longitudinal |nove-- meat, supporting blocks or castings 23 having, re ections z tarefsecured to the ex- 16 trenntie's of';the' cross bars 18, and an le irons 25 are so attached to the sides of tie rectangular frame or box '17 as to rest upon the blocks 23, the-adjacent surfaces of the angle irons being grooved to-rcceive the pr0- 20 jcct-ions 24. It is necessar that guidcways of some sort be provided in order to' |naintaiu the proper 'rclation'bctween the table and its'su )orting structure, when the lattcr'is tilte ,as hereinafter pointed out; V In order that the surface of the table may be made attractive to magnctiza'ble particles, a plurality of coilsections 26 are provided which are-substantially square and arefitted togetherto form a series of slats or 30 flat bars which constitute the surface o'f the.

jtable pro'per'and upon which a screen or a covering of fabric-may be spread, accordi fins :1 dry or a wet method is to be practicec One -of the sections 26 is illustratedin plan and elevation in Figs. 6 and 7, to which pecial reference may nowbe had, and coma rises 11 iplurality of magnctizable crossars onstrips 27, which serve to space-and support. a series of magnetizable'core mem- 40 bers 28, about which a. plurality of long flat coils 29 are wound. The coils are held in "posit-ion by a series of thin strips 30, which i are secured to the core members 28 and are of substantiallv the same width as the coils 46 29 and parallel to each other. These stripsare separated by relatively'narrow spaces and lie substantially in one plane, so that their form. the surface of the concentrating 'table 50 In order to prevent the coils from bulging in t-he'centcr, spacing members 31, comprisin'g loops of resilient strap jointed together,

are forced into. thespace's between the'eoils,'

from below and are-secured to. the -.core

s5 members'28. Theflconductipgleads of the coils are connected to], 1ureIity' of- .tcrminals 32 that are mean 'en'- sin-insulating strip 33, so that the electrical connections of the coils naybewariedto produce the prgper. magnetism of the table surface.

pecial reference may now be had to 4 Figs. 1 and id; in which the surface of the cunrx'ntrati :table' is adapted .for a s0- c'alled dr roces'sinwhich dr a'rti'cls'nf p spirit of my invention, and I esire that 139 05 crushed ore are? feddhrough the hopper.

effected..- v

ueolsea i and is supplied with air under pressure which is thus forced between the coils 29 and tlirough'the screen 34. The strips 35 are preferably tapered from the hi her end of the table to the lower end .in or er toxincreasethe efiiciency of the se aration as the PflG'lUClGS of ore approach t e end of the ta 0. 4 In order to adaptthc surface of the table for what is known as the wet process, in.

which the crushed ore is mixed with water before it is passed through the hopper onto the surface of the tablc,-a structure such as that shown in Figs. 2, 3, i, S, and 9 may be employed. ',\5 here shown, auvateiproof film or sheet 30, such as linoleum, is spread over'the slats 30, the tapered strips or barriers 35 being secured in position 'on top of the film or sheet.

The operation of the device isas follows Assuming that the table has been iven' a suitable longitudinal and lateral inc ination and that an oscillatory movement is imparted to it by the mechanisin'2; particles of ore, either dry or mixed with water,- as the case may be,'are fed through the hopper i'aonto the highest corner of the table, the: surface of which is magnetized by the encrgizin of the coils -29. The s ecific grav ty of t-l1e.waste material is usual y less than that of the metallic'ore, and, furthrmore," the useful articles. are usually attracted by magnetic force to a greater ex--' tent than are the waste particles.- Assumin that ore having such properties has been fed onto the table, the motion of the latter 1 will cause-the-lighter particles to jump oy'er .the'barriers' and eventually pass off of the table at the side, while the heavier and use ful articles the specific gravity of which' -to pass along-the channels formed by thev partitions on barriers 35, to the-end o f table. In this way the desired separatien 1s In some case's, it may be desirable to make thebarriers 35 My inglen as shown 'in Fig. 4, andthe d istances fit ween barriersas well as ,t-he1r form arran ment may be varied to suit existmg'con --126 itions.

Itis conceivable that various structural modifications maybe effected in the coneen- (rating deviceI without departl from the has. con vi'rtuall increased by'the' mag- 11E netic attraction o thetable, ar'e'constramed lit only such limitations be imposed as are indicated in the appended claims.

I claim as my invention:

1. In a concentrating device for ore, the combination with a rotatably adjustable supporting frame, a table comprising a plurality of flat magnetizable bars or strips slightly separated from each other, magnetizable webs attached to'the flat bars or strips, cross-rods attached to the opposite sides of the webs for spacing the bars, and magnet coils fitted onto the webs between the bars a-nd the cross-rods, said table being adjustably mounted on the supporting frame, and means for imparting an oscillatory motion to the table.

2. In a concentrating device for ore, the combination with a plurality of parallel core members of magnetizable material and spaced strips mounted thereon in a single plane, of long fiat coils surrounding the core members from end to end, and spacing members for said coils comprising loops of a resilient.- strap forced into the spaces between adjacent coils.

3. In a concentrating device for ore, a rotatably adjustable supporting frame and a table mounted on said frame and comprisinga plurality of flat magnet-izable strips spaced apart with open spaces between the strips, magnetizable webs secured to the strips, cross-bars attached to the opposite sides of the webs for spacing the strips, magnetic coils fitted onto the webs between said strips and said bars, and a screen mounted on said strips.

L In aconcentratingdevice for ore, a rotatably adjustable supportingframe and a table mounted on said frame and comprising a plurality of llat magnetizable strips spaced apart, webs attached to the strips and cross rods attached to the webs for spacing the strips, magnetic coils fitted onto said webs between said strips and said rods, :1 screen mounted on said strips, and tapered barrier strips mounted on said screen.

5. In a concentrating device for ore, a

plurality of parallel strips, magnetic coils secured to said strips, spacing members for said coils comprlsmg loops of a resilient strap forced into the spaces between said coils, a screen secured to said strips, and barrier strips located on said screen.

6. In a concentrating device for ore a rotatably adjustable support frame, a table comprising a.'plurality of fiat metal stri s spaced apart, a magnetic coil, substantial y the length and width of a strip, secured to silient strap forced into the spaces between adjacent coils, and electric connections for said coils located beneath said table.

In a concentrating device for ore, an

adjustable supporting frame, table comprising a plurality of parallel metal strips, magnetic coils secured to said strips, spacing rods for securing said coils and said strips in place, Snacing members'located between adjacent coils, a screen secured to said strips above said coils, barrier stripsmounted on said screen, and electric connections for said coils lo filiQd between said tables.

9. In a concentrating device for ore, an adjustable support frame and a table comprising parallel metal strips spaced apart, a 4

magnetic coil, substantially the length and width of a strip, secured to each strip, a screen located on said strips above said coils, barrier strips located on said screen, and electrical connections for said coils located beneath said table.

In testimony wher of, I have hereunto subscribed fmy name this 7th day of June, 1907.

HERBERT T. HER-R.

Witnesses Washer G. CARR, BIRNEY HINES. 

